Captain Flint is a fictional character from the classic adventure novel "Treasure Island," written by Robert Louis Stevenson. He is portrayed as a notorious pirate and the captain of the ship Hispaniola. Flint is known for his cunning and ruthless nature, as well as his hidden treasure, which becomes the central focus of the story. In "Treasure Island," Flint's legacy influences the actions of other characters, particularly Long John Silver, who was once his quartermaster. Flint's treasure map sets off a thrilling quest for treasure, leading to conflicts and adventures among pirates and treasure hunters.